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lark-parser 0.5.4

Lark focuses on simplicity and power. It lets you choose between two parsing algorithms:

Earley : Parses all context-free grammars (even ambiguous ones)! It is the default.
LALR(1): Only LR grammars. Outperforms PLY and most if not all other pure-python parsing libraries.
Both algorithms are written in Python and can be used interchangably with the same grammar (aside for algorithmic restrictions). See “Comparison to other parsers” for more details.

Lark can automagically build an AST from your grammar, without any more code on your part.